Malicious PDF — malware analysis report

Static analysis result for SHA-256 632f330f14de72d0…

MALICIOUS

PDF

65.6 KB Created: 2021-08-28 00:28:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 84158251c6045404ef9f61fda14b984a SHA-1: 786b99a2dd0e64ddbe75a1b59d26610aff63634e SHA-256: 632f330f14de72d025e5d4c964654e87b23e5d9348b84bc82f2656e5a6ac55f8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to external websites, many of which appear to be compromised CMS installations used for hosting malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure suggests a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8850

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160887073edd7e---moriso.pdf In PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce67187570---mojan.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/03e6db7be1029d9d711c88056d91f2bf/12471438906.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/15380858271.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/92822511218.pdfIn PDF document text
    • https://samyenngochoang.com/wp-content/plugins/super-forms/uploads/php/files/hp7humabf1kg4s1tie2e70h6a7/sogebutobokewufo.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/16082acbbdd8cc---55331419254.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160e146ad9ae27---wekomul.pdfIn PDF document text
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/moxewodir.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/39636720876.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/r206bk8ur3q3vbl6h6vvl042i5/30204756641.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076d3797048a---jofodepuzisuri.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/cln7npfjoi5om299bg3gfpqod3/90853212793.pdfIn PDF document text
    • http://workcoop.org/fckeditor/userimages/file/20210717074838.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/2b2d69043703a8f28838880c7dbc08d2/71852661342.pdfIn PDF document text
    • http://chikatere.com/Upload/files/22858958510.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/59158770136.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/202162301191032.pdfIn PDF document text
    • http://boissee.fr/userfiles/file/8633412068.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/2h5gr8bh0ttd3l2ip1qqsf4vql/72651914568.pdfIn PDF document text
    • https://aldaserwis.pl/ckfinder/userfiles/files/mipenerukiru.pdfIn PDF document text
    • https://gaziemirkentkonseyi.com/upload/files/niwefokifunudov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=catoosa+county+tag+and+titlePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4B1 10692 bytes
SHA-256: 9f87d7165b2569066c8f21c6a50ec3a26e7f364269cf6e78c2b6296170418e70
font_01_sfnt_off0000dd41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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